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Base64 Encode & Decode Online Free | MyToolbox

Encode or decode Base64 strings instantly. Free Base64 converter for developers. Handles text and binary data. No signup needed.

How to Use Base64 Encode/Decode

  1. 1

    Paste your input

    Paste the text you want to encode, or the Base64 string you want to decode, into the input field.

  2. 2

    Choose encode or decode

    Click Encode to convert text to Base64, or Decode to convert Base64 back to readable text.

  3. 3

    Copy the result

    The output appears instantly. Click copy to place it on your clipboard.

Why Use Our Base64 Encode/Decode

Encode and Decode

Two-way conversion. Encode any text or data to Base64, or decode any Base64 string back to its original form.

Handles UTF-8

Correctly encodes and decodes UTF-8 text including non-Latin characters, emojis, and special symbols.

Instant Processing

Results appear immediately as you paste. No loading, no processing time for typical inputs.

Developer Friendly

Clean output without line breaks or padding issues. Ready to paste into code, config files, or API requests.

Client-Side Only

All encoding and decoding happens in your browser. Sensitive data like API keys and tokens never leave your device.

Frequently Asked Questions

Is the Base64 tool free?
Yes, completely free. No limits on input size, no signup, and no ads.
Is my data secure when encoding?
Yes. All encoding and decoding happens in your browser. Your data is never sent to any server — critical for encoding sensitive strings like API keys or tokens.
What is Base64 used for?
Base64 is used to encode binary data as text for transmission in text-only formats. Common uses include email attachments (MIME), embedding images in CSS/HTML (data URIs), and encoding API credentials.
Can I encode API keys and passwords with this?
Yes, and since the tool runs entirely in your browser, your sensitive data stays on your device. Never use online tools that upload your data to a server for this purpose.
How does this compare to base64encode.org?
Both encode and decode Base64 correctly. MyToolbox processes everything client-side for better privacy and offers a cleaner interface with no ads.
Does it handle binary data?
The tool handles text input and converts it to/from Base64. For raw binary files, the standard text encoding approach works for the vast majority of use cases.
Does this work offline?
Yes. Once the page is loaded, encoding and decoding work without an internet connection since all processing is client-side JavaScript.
Is there an input size limit?
No hard limit, but very large inputs (several megabytes) may slow down your browser. For typical developer use cases, there are no issues.

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